<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ko" lang="ko">
<head>
    <title>支付宝扫码支付</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=no" />
    <script type="text/javascript" src="//cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
    <script type="text/javascript" src="//static.runoob.com/assets/qrcode/qrcode.min.js"></script>
</head>
<body onload="makeCode()">
<input id="text" type="hidden" value="" style="width:80%" /><br />
<div id="qrcode" style="width:100px; height:100px; margin-top:15px;"></div>

</body>

<script type="text/javascript">


    var qrcode = new QRCode(document.getElementById("qrcode"), {
        width : 100,
        height : 100
    });

    function makeCode () {
        var elText = document.getElementById("text");
        //
        // if (!elText.value) {
        //     alert("Input a text");
        //     elText.focus();
        //     return;
        // }

        qrcode.makeCode(elText.value);
    }

    // makeCode();

    /*    $("#text").
        on("blur", function () {
            makeCode();
        }).
        on("keydown", function (e) {
            if (e.keyCode == 13) {
                makeCode();
            }
        });*/
</script>

</html>
